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Extraction and recognition of handwritten alphanumeric characters from application forms

机译:从申请表中提取和识别手写字母数字字符

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This paper presents a reading system capable of extracting the handwritten text and recognizing the alphanumeric characters from application forms. The system has been designed and implemented in the framework of the LE project ACCESS. The application forms are scanned and the handwritten parts are automatically separated. The character recognition is based on discrete hidden Markov models. In our system the estimation of the HMM parameters has been simplified by using a left-to-right HMM with step one. The system recognizes 60 alphanumeric characters (26 English upper-case letters, 24 Greek upper-case letters and 10 digits). The experiments carried out achieved a recognition rate of 93% in character level and 88% in word level. The latter improved to 97% by lexical confirmation. A novelty of this system is the feature extraction algorithm applied to the characters and the resulting very fast recognition.
机译:本文提出了一种能够提取手写文本并从申请表中识别字母数字字符的阅读系统。该系统是在LE项目ACCESS的框架中设计和实现的。扫描申请表并自动分离手写部分。字符识别基于离散隐马尔可夫模型。在我们的系统中,通过在步骤1中使用从左到右的HMM,简化了HMM参数的估计。系统可识别60个字母数字字符(26个英文大写字母,24个希腊大写字母和10位数字)。进行的实验实现了93%的字符识别率和88%的单词识别率。通过词汇确认,后者提高到97%。该系统的新颖之处在于将特征提取算法应用于字符并产生非常快速的识别。

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